SSH, the Secure Shell, 2nd Edition by Daniel J. Barrett;Richard E. Silverman;Robert G. Byrnes

Author:Daniel J. Barrett;Richard E. Silverman;Robert G. Byrnes
Language: eng
Format: mobi
Tags: COMPUTERS / Security / General
Publisher: O'Reilly Media
Published: 2009-06-29T23:00:00+00:00

7.4.17 Logging and Debugging

Earlier in the chapter, we introduced the -v command-line option which causes SSH clients to print verbose debugging messages. [7.3] Verbose mode works for ssh and scp, e.g.:

$ ssh -v server.example.com

OpenSSH also has the LogLevel keyword, which takes the following levels as an argument: QUIET, FATAL, ERROR, INFO, VERBOSE, DEBUG1, DEBUG2, and DEBUG3 (in order of increasing verbosity). The value DEBUG is equivalent to DEBUG1, and:

# OpenSSH

$ ssh -o LogLevel=DEBUG

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